Akai AP-Q310 - Page 38

No. 9
MODEL ap-9310/C
V.
ELECTRICAL ADJUSTMENT
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OFF -SET
VOLTAGE
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Fig. 9
OFF-SET VOLTAGE ADJUSTMENT (VR2, 3) AND TORQUE DIFFERENCE ADJUSTMENT (VRL)
2)
3)
4)
Disconnect the motor connection cord (Jl).
Short connector (Jl) pins (7), (8) and (1).
Set VR1 to the center.
Turn the power switch ON.
Connect an digital voltmeter to terminal (10) of connector Jl and
adjust VR3 until it reads -120 mVDC.
Turn the power switch OFF.
Short connector (Jl) pins (4), (5) and (1).
Turn the power switch ON.
Connect a digital voltmeter to terminal (9) of connector J1 and adjust
VR2 until it reads -120 mVDC.
Turn the power switch OFF and connect the motor connection wire to
connector (Jl).
Connect an oscilloscope to (9) and (10) of connector (Jl).